NNAT Number Series Patterns

Question 1

In a visual number pattern showing 2, 4, 8, 16, what operation determines the next number?

Accepted Answer

Multiplying by 2 each time

Answer

Each number is doubled (multiplied by 2), creating a geometric sequence.

Question 2

A sequence shows shapes with 1, 3, 6, 10 dots. What pattern determines the next count?

Accepted Answer

Triangular numbers — each adds one more than the previous addition (1, +2, +3, +4, +5)

Answer

These are triangular numbers where the difference between terms increases by 1 each time.

Question 3

A visual sequence alternates between adding 3 and subtracting 1. Starting at 2: 2, 5, 4, 7, 6. What comes next?

Accepted Answer

9 (adding 3 to 6)

Answer

The pattern alternates: +3, -1, +3, -1. After 6 (which was -1), the next step is +3, giving 9.

Question 4

What strategy helps identify complex number sequence patterns?

Accepted Answer

Calculate the differences between consecutive terms, then check if those differences form their own pattern

Answer

Finding the first differences (and sometimes second differences) between terms often reveals the underlying pattern.

Question 5

A sequence shows: 1, 1, 2, 3, 5, 8. What comes next?

Accepted Answer

13 (each number is the sum of the two before it)

Answer

This is the Fibonacci sequence where each term equals the sum of the two preceding terms: 5 + 8 = 13.

(NNAT) Naglieri Nonverbal Ability Test Practice Test